Improvement in damper-regulators for steam-boiler furnaces



2 Sheets-Sheet l.

W. R. COLE. Damper-Regulator for Steam-Boiler Furnaces.

No. 199,692. Patented Jan. 29,1878.

2 Sheets-Sh-eet 2.

' W. B. COLE. Damper-Regulator for Steam-Boiler Furnaces.

Patented Jan. 29,1878.

N. PETERS. PHOTO-LITMOG RAPHER, WASHINGTON,

UNITED STATES WILLIAM R, GOLE, OF DETROIT MICHIGAN.

IMPROVEMENT; IN DAMPER-REGULATORS'FORSTEAM BOILER FURNACES.

Specification forming part of Letters Patent No. 199,6!)2, dated anuary 29, 1878; application filed November 6, 1877.

Damper-Regulators for Steam-Boiler Furfi aces, of which the following is a specificaion:

' The nature of this invention relates to certain new and useful improvements in that class of inventions which'are designed to operate the draft-controlling dampers of steam-generators by thepressure of {steam through a safety-valve.

. The invention consists in the peculiar construction of the safety-valve and its combination with the controlling-valve case; also, in

the peculiar construction of the valve in combmation with its case and rock-shaft also,in thecombination'of the weighted levers and connecting-cord, so arranged that the damper will be overweighted and always remain open, except when operated upon bythe steam-presspro in the boiler through the safety-valve and 1ts connections; also, in the combination of the various parts to produce the desired result. Figure 1 1s a perspective view of my improved device as. attached to a steam-boiler, showmg the damper in the smoke-stack open. Flg. 2 1s anielevation of the valve-case with the cover'removed. Fig. 3 is a vertical longitudlnal section through the valve-case, showmg the 1n1et for steam from the safety-valve. Fig. 4 s a vertical cross-section through the safety-valve, showing its construction and arrangement of one steam-port on each side of the lever, to carry steam to the valve-case. Fig. 1s a plan view of one side of the valve or wing, showing the method of packing the same.

Like letters indicate like parts in each figure.

in the drawings, A represents the steamboiler, provided with steam-dome B and smokestack 0, in the usual manner of construction. A steam-pipe, D, leads from the generator to the safety-valve, and is provided with a valve, a,by1 neans of which the flow of steam through the pipeis regulated as desired. A disk, b, ground to its seat, forms a valve, which, when seated, prevents a flow of steam into the safetyvalve chest 0. A loose stem, cl, of proper length, stands upon the upper face of this disk, and

the upper end, projecting upward through the solid end "of the pipe 6, is designed to raise the lever f, when the valve is raised by a pressure of steam sufficient toovercome the weight of the sliding ball When this is done steam escapes from the boiler into steam-chamber c, and is conducted, by one or more ports, h, on one or both sides of the lever f, if desired, into the chamber i, whence it is conducted to the win g-valve case It through the pipe I.

m is a wing-valve, rigidly secured at its upper end to the rock-shaft a, properly journaled into the upper end of the case k. One face of this wing is providedwith two L-shaped strips of metal, 70', as shown in Fig. 5, and are secured thereto by means of the clamp 0, which also holds the springs p in place. The ofice of these springs is toset out the strips, thereby packing the valve.

Under pressure it will be found that some steam will pass to the other side of the wing. An escape for this is provided by the escapeport '1". When the valve is forced clear back by the pressure from the boiler, a plug, 8, rigidly secured to the reverse face of the wingvalve, enters and closes this port. The rockshaft 41. projects through the rear side, and upon it is sleeved theperforated and weighted lever 23, and this lever is prevented from turning upon the shaft by being between two jamnuts, on the projecting end of the shaft, which is threaded for that purpose. The lever tis perforated, as shown, for the purpose of dampery in the smoke-stack.

It will be readily seen that the greater the pressure of steam the more the damper will be closed, thereby causing the fire to decrease in the furnace. As the pressure is diminished the damper will gradually open, thereby increasing the draft of the furnace.

Whatlclaim as my invention, and desire to secure by Letters Patent, is-

1. In :a damper-controlling device, and in combination therewith, and with a pipe communicatin g with a steam-generator, and provided with a valve, a safety-valve wherein the Fries;

dislr valves b, chest 0, stem (1, and weighted lever f are arranged to operate substantially as I described, and for the purposes set forth.

2. In combination with a safety-valve the port or ports h on one or both sides ot the safety-valve lever, and in the support thereof, affording communication for ,the passage of steam from the chest 0 to the chamber '5, substantially as and for the purposes specified.

3. In combination with the safety-valve of a steam-generator, the triangular and segmental shaped valve-case, provided with inlet and out: let ports, and the wing-valve, rigidly secured to a projecting shaft, substantially as and for the purposes described.

4. In a valve-case, and in combination therewith, the metallic strips 70 and springs 19, se-

cured to the face of the wing-valve m by damper, substantially as specified, and for the purposes set forth.

' WM. R. ooLE.

Witnesses H. S. SPRAGUE, R. A. SPRAGUE. 

